Withdrawal

Giving up caffeine after using it for a long time is challenging because the body has to get used to functioning without it. Withdrawal symptoms usually start within 24 hours after the last dose – or even within 6 hours for people who consume a lot of caffeine regularly. The symptoms can last for around 36 hours, or even longer for people who consume a lot.

In Australia between 2004 and 2010, there were 297 calls to the NSW Poisons Information Line concerning toxicity from caffeinated energy drinks. The most commonly reported symptoms included palpitations/tachycardia, tremors, shaking, agitation and restlessness.10

Consumption

1 billion cups of coffee per year were consumed at cafés, restaurants and other outlets in Australia in 2006.9

Consumption of coffee has doubled over the past 30 years from 1.2 to 2.4 kg per person in Australia.9

Global coffee consumption increased in 2010, with consumers spending a total of $10.7 billion, which is equivalent to 2.4 kilograms of coffee per person, per year.11

Sales of energy drinks in Australia and New Zealand increased from 34.5 million litres in 2001 to 155.6 litres in 2010.12